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Optical Test and Alignment System

Publishing Venue

IBM

Related People

Kern, RW: AUTHOR

Abstract

This system tests and aligns optical axes such as, for example, optical axes 10 and 11 of navigation telescope 12 and a computer driven scanning device such as the pair of scanning mirrors 13 and 14 as in drawing A. Telescope 12 is rigidly mounted on the inner surface of space vehicle wall 15 by cylindrical mounting flange 16. Its line of sight or axis 10 is positioned to pass through window 17 and impinges on the reflective surface of mirror 13 thence onto the reflective surface of mirror 14. A servo system, not shown, selectively drives mirrors 13 and 14 for rotation about their respective tilt axes in two perpendicular directions. Such is indicated by arrows 18a and 18b. In addition, the servo system drives mirror 14 in revolution about mirror 13 indicated by arrow 19.

Country

United States

Language

English (United States)

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Optical Test and Alignment System

This system tests and aligns optical axes such as, for example, optical axes
10 and 11 of navigation telescope 12 and a computer driven scanning device
such as the pair of scanning mirrors 13 and 14 as in drawing A. Telescope 12 is
rigidly mounted on the inner surface of space vehicle wall 15 by cylindrical
mounting flange 16. Its line of sight or axis 10 is positioned to pass through
window 17 and impinges on the reflective surface of mirror 13 thence onto the
reflective surface of mirror 14. A servo system, not shown, selectively drives
mirrors 13 and 14 for rotation about their respective tilt axes in two perpendicular
directions. Such is indicated by arrows 18a and 18b. In addition, the servo
system drives mirror 14 in revolution about mirror 13 indicated by arrow 19. By
mounting the scanning device externally, a relatively large viewing area is
available for telescope 12. The latter is fixed within the vehicle to conserve
space.

To align telescope 12 and mirrors 13 and 14, a set of reference mirrors 20 is
mounted at various positions. Each mirror 20 is in a predetermined optical
alignment and orientation with the telescope scanning device system. Mirrors 20
are fixed on the inner surface of an ejectable transparent dome 21. This is
mounted externally on wall 15 by flange 22. Dome 21 also serves as a protective
cover during launching operations.

In order to calibrate the system, reticle 23 is illuminated by lamp 24 and
projected onto the reflective surface of half-mirror 25. The latter is rigidly
mounted in telescope 12 and so positioned that the image of reticle 23 is
reflectively transmitted along optical axes 10 and 11 and then onto one mirror 20
at each of the mentione...